Dask shuts down all of the robots whose programming has not been changed, leaving just the killer robots dedicated hosting and D84 operational. Dask is later revealed to be the mad scientist Taren Capel, intent on 'releasing [his] 'brothers' (the robots) from bondage to human dross' and 'programming them with an ambition to rule the world'. Taren Capel orders his modified robots to destroy the remaining humans internet marketing and the Doctor and Leela. Leela shows the Doctor a damaged robot in the storage bay with its hand covered in blood - which the Doctor reasons is Borg's, guessing that Borg sabotaged the engine controls in a suicidal attempt to destroy the miner and all the killer robots on board. The Doctor dismantles the damaged robot and creates a final deactivator - a device that will internet phone destroy any still functioning robots at close range. The Doctor hides Leela in Taren's workshop with a canister of helium gas, telling her to release it slowly when Taren comes in. The Doctor hopes that this will change Taren's voice, so his robots - unable to recognise him - won't obey his credit card processing orders.Taren arrives and damages D84, but the robot is able to activate the Doctor's device to destroy a killer robot, knowingly sacrificing itself in the process. Leela releases the helium gas, causing Taren's voice to become high-pitched and squeaky, and Taren is killed by SV7 when it fails to identify his voice. The Doctor then destroys SV7 with a laser probe.